M5x0.9 = unobtainium?

[Heirloom]

I am looking for the straight-forward route. If I can find the nut, that is easier than my second option. My second option would be to remove the ammeter and replace the terminal posts with the newer standard M5x0.80 posts. It would not be expensive, just time consuming. The ammeter works, so it seems wasteful to replace the whole unit.

 

[Racer65]

How about here?

M5X0.9 M5 X 0.9 OVAL HEAD SCREW STAINLESS STEEL 18 MM LONG M5 X 0.9 SCREW

 

[Bear]

Wow. $3.50 for ONE screw. Talk about getting screwed !

 

[Heirloom]

How about here?

M5X0.9 M5 X 0.9 OVAL HEAD SCREW STAINLESS STEEL 18 MM LONG M5 X 0.9 SCREW

I need nuts for my ammeter terminals. Those look like screws.

Sent from my LGLS990

 

[jvincig01]

I am looking for the straight-forward route. If I can find the nut, that is easier than my second option. My second option would be to remove the ammeter and replace the terminal posts with the newer standard M5x0.80 posts. It would not be expensive, just time consuming. The ammeter works, so it seems wasteful to replace the whole unit.

Just do this. It works like a charm.... How to make rare m5x.9 screws (found on early-67) PICS included

 

[jvincig01]

Just do this. It works like a charm.... How to make rare m5x.9 screws (found on early-67) PICS included

In between the time I wrote this last message and now, I made 8 more screws. Literally took me a few minutes. They thread beautifully.

...via IH8MUD app

 

[Heirloom]

I have found a M5x0.9 tap. Do you think this will work sufficiently with the inverse of what you did (using a 10-24 nut)?

 

[jvincig01]

I have found a M5x0.9 tap. Do you think this will work sufficiently with the inverse of what you did (using a 10-24 nut)?

Yes


...via IH8MUD app

 

[Heirloom]

Update: Chasing a M5x0.9 tap through a 10-24 nut, My problems are solved. Thanks @jvincig01 for the useful advice.

 

[FJ40Jim]

Why not chase a M5x.9 tap through a .8 nut, or vice-versa? It's what I've done in the past. Am I doing it wrong?

 

[DSRTRDR]

maybe I could visit the local hardware store when I'm in Germany next time and make Millions here on MUD

 

[Fast Eddy]

maybe I could visit the local hardware store when I'm in Germany next time and make Millions here on MUD

You could be a thousand-aire.

 

[jvincig01]

Why not chase a M5x.9 tap through a .8 nut, or vice-versa? It's what I've done in the past. Am I doing it wrong?

That will cause the threads to cross.


...via IH8MUD app

 

[jvincig01]

You could be a thousand-aire.

He will make tens and tens of dollars


...via IH8MUD app

 

[Fast Eddy]

He will make tens and tens of dollars

Or she...

 

[jvincig01]

CORRECTION on threads. To create M5 .9 threads you will need to use 10-32 screws and NOT 10-24. I made a few today and realized this.

 

[Peter Horn]

While reassembling my hard top I ran into some screws I didn't have in my stash of new metric hardware. On the inside of the rear hatch there are 8 screws holding the panel to the hatch and another 2 holding the handle to the panel. They are M5x0.9 with a Phillips counter sunk head.

I can't find this pitch of screw anywhere, let alone the Phillips counter sunk part. Anyone have a source for new screws? Or have some used you want to sell? I'm missing two of the short ones, and the 2 long ones for the handle have damaged Phillips heads.

Hoping to keep the stock pitch... but if I can't come up with any I'll end up drilling them out and tapping for a common screw.

Thanks

M5x0.9 is part of an archaic French screw thread standard. Sizes less than M6x1 did not match German DIN. M5x0.9 could be found on older French cars. Ditto is true for screws on older Japanese cars and motorcycles which also at one time had M5x0.9. Their archaic sizes less than M6x1 did not match DIN either and perhaps not all sizes in the archaic French standard. I used the have a document that showed both but I long since lst it.

 

[Peter Horn]

M5x0.9 is part of an archaic French screw thread standard. Sizes less than M6x1 did not match German DIN. M5x0.9 could be found on older French cars. Ditto is true for screws on older Japanese cars and motorcycles which also at one time had M5x0.9. Their archaic sizes less than M6x1 did not match DIN either and perhaps not all sizes in the archaic French standard. I used the have a document that showed both but I long since lst it.

 

[Peter Horn]

M7x1 is unusual, but is still part of DIN and ISO as a second choice ISO metric screw thread - Wikipedia

 

[largeone]

Came across this thread looking for source for M5x0.9 machine screws. They are also used to hold on the back of the early front heaters. The screws that hold the defrost louvre are common M4 thread, but the ones that hold on the back of the heater are M5x0.9 - 8mm long.

I saw a post on a relic motorcycle site that said that the JIS switch occurred April 1967. That may have been for a specific motorcycle, but confirms what was posted above that the switch occurred in early 1967. My FJ40 is an early 1967 and shares a lot w/ the 1966 model year from what I have found so far. I had to ruin three screws to get the back of the heater off, so...here I am. I guess I'll try to make a few and rehab the others, even though they are pretty rusty from a failing heater core.

This guy sells them for $2.00 each...a bit longer, but might be able to be cut off?